Subversion Repositories openrisc

//=======================================================================

//

//      cstartup.cxx

//

//      Support for startup of ISO C environment

//

//========================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####                                            

// -------------------------------------------                              

// This file is part of eCos, the Embedded Configurable Operating System.   

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.

//

// eCos is free software; you can redistribute it and/or modify it under    

// the terms of the GNU General Public License as published by the Free     

// Software Foundation; either version 2 or (at your option) any later      

// version.                                                                 

//

// eCos is distributed in the hope that it will be useful, but WITHOUT      

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or    

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    

// for more details.                                                        

//

// You should have received a copy of the GNU General Public License        

// along with eCos; if not, write to the Free Software Foundation, Inc.,    

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            

//

// As a special exception, if other files instantiate templates or use      

// macros or inline functions from this file, or you compile this file      

// and link it with other works to produce a work based on this file,       

// this file does not by itself cause the resulting work to be covered by   

// the GNU General Public License. However the source code for this file    

// must still be made available in accordance with section (3) of the GNU   

// General Public License v2.                                               

//

// This exception does not invalidate any other reasons why a work based    

// on this file might be covered by the GNU General Public License.         

// -------------------------------------------                              

// ####ECOSGPLCOPYRIGHTEND####                                              

//========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     jlarmour

// Contributors:  

// Date:          2000-04-30

// Purpose:     

// Description: 

// Usage:       

//

//####DESCRIPTIONEND####

//

//========================================================================

// CONFIGURATION

#include <pkgconf/system.h>         // CYGPKG_KERNEL

#include <pkgconf/libc_startup.h>   // Configuration header

// INCLUDES

#include <cyg/infra/cyg_type.h>     // Common type definitions and support

#include <cyg/infra/cyg_trac.h>     // Common tracing support

#ifdef CYGPKG_KERNEL

# include <pkgconf/kernel.h>        // eCos kernel configuration

# include <cyg/kernel/thread.hxx>   // eCos thread support

# include <cyg/kernel/thread.inl>

#endif

// FUNCTION PROTOTYPES

externC void

cyg_libc_invoke_main( CYG_ADDRWORD );

// EXTERNS

#ifdef CYGSEM_LIBC_STARTUP_MAIN_THREAD

extern Cyg_Thread cyg_libc_main_thread;

// FUNCTIONS

externC void

cyg_iso_c_start( void )

{

    static int initialized=0;

    CYG_REPORT_FUNCNAME( "cyg_iso_c_start" );

    CYG_REPORT_FUNCARGVOID();

    if (initialized++ == 0) {

        CYG_TRACE0( true, "Resuming cyg_libc_main_thread" );

        cyg_libc_main_thread.resume();

    }

    CYG_REPORT_RETURN();

} // cyg_iso_c_start()

// define an object that will automatically call cyg_iso_c_start()

class cyg_libc_startup_dummy_constructor_class {

public:

    cyg_libc_startup_dummy_constructor_class() { cyg_iso_c_start(); }

};

static cyg_libc_startup_dummy_constructor_class cyg_libc_startup_obj

                                  CYGBLD_ATTRIB_INIT_AFTER(CYG_INIT_LIBC);

#elif defined( CYGSEM_LIBC_STARTUP_MAIN_INITCONTEXT )

// otherwise replace the default cyg_user_start(), but of course keep

// it a weak symbol in case the user wants to override

externC void

cyg_user_start(void) CYGBLD_ATTRIB_WEAK;

externC void

cyg_user_start(void)

{

    cyg_libc_invoke_main(0);

}

externC void

cyg_iso_c_start( void )

{

    static int initialized=0;

    CYG_REPORT_FUNCNAME( "cyg_iso_c_start" );

    CYG_REPORT_FUNCARGVOID();

    // In case they want to explicitly invoke the C library from

    // cyg_user_start() themselves

    if (initialized++ == 0) {

        cyg_libc_invoke_main(0);

    }

    CYG_REPORT_RETURN();

}

#else

externC void

cyg_iso_c_start( void ) {}

#endif

// EOF cstartup.cxx